All proteins selected by PLSKO have been reported to be related to preeclampsia, including SERPINE1 (Zhao et al. 2013), HSPB1 (Martin et al. 2022), CXCL10 (Gotsch et al. 2007), DKK1 (Kasoha et al. 2021). Here, HSPB1 is linked to preeclampsia.